"TTI Armory® 5.56mm Cycling Subsonic Ammunition was designed to reliably cycle the action of suppressed AR-15/M16 rifles. Originally designed for the AR-15/M16 carbines, the suggested barrel length is 14.5” & 16”. The recommended barrel twist is 1/7”. This product is not currently commercially available. ***coming soon*** "

Was gonna buy some EBR stuff but, wouldn't mind hearing opinions on this ammunition as well.